Thanks for posting the DSDT.aml
it worked perfect for me!
however.. the audio is not working for me, even with VoodooHDA I get kernel panics.
So i searched the internet for a proper kext.
The website you said in the OP has another topic about the Connexant CX20672.
And that should be the soundcard in the X220!
I've used google translate to understand the chinese words are and this is what i've found out:
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1, no sonic boom.
2, output, headphone and built-in adaptive.
3, enter the built-in microphone and external microphone adaptive.
3, inside and outside can be a clear recording.
4, sleep wake will not fail.
5 solve mute.
6, add HDMI sound card (unconditionally not test whether, conditional friend to help test.)
At this point, the perfect, quasi-perfect because the external microphone is plugged in the line out, this is no way the white Apple does not support an external microphone disappeared from the panel on the failure to set an external microphone.
Finally, on the attachment. Replace the package all the files inside can be used, and what position to replace APPLEHDA inside position in the package.
Sorry permission is not enough only use the RAR sub-volume compression, best replace and then installed in the LION WIN under decompression.
Note that, when put to use an external microphone to adjust the volume to maximum or large.
X220, I5 sound card machine was CX20590, but for the CX20672 driver under WINDOWS. Enable the device ID in the LION name CX20590.
PS: There are two conditions need friends to help test.
1, is the HDMI sound card test problems, conditional to look at whether it is capable of driving the graphics HDMI sound card.
The theory is not a problem.
2, the start time there will be a prompt to the Sound assertions "0 == hdaGfxCandidate is" failed in AppleHDAController at line 1094 goto the Exit. Is any reason. A friend to help improve the experience.
This sound card test no problem, when ready to write articles more detailed tutorial for the novice like me, a friend, hope all my friends detours, we jointly improve the sharing of experiences. I hope all the friends of the black apple more and more perfect!
Looking forward to your testing and feedback!
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The translation isn't perfect but good enough.
The blue text I don't understand, can someone help me out with that?
I've managed to register on the website and download the file from the chinese website.
and here it is:
Link 1:
http://www28.zippyshare.com/v/14879609/file.html
Link 2 (if link one doesn't work):
http://www.peeje.com/files/361751511/CX20672.zip.html
p.s. there's also an DSDT.aml in the file but I don't know if that one works, haven't tested any of these file's yet!